Charles terrot



(No Model.) 2 Sheets-Sheet '1.

G. TERROT.

VELOGIPEDE.

No. 435,466. Patented Sept. 2, 1890.

(No Model.) 2 SheetsSheet 2.

0. TERROT.

VBLOGIPBDE.

No. 435,466. PatentedSept. 2, 1890.

-I nun HIIIIIII M u W E I k N "H N "WA/WM EMMA/KW UNITED STATES PATENT OFFICE.

CHARLES TERROT, OF CANNSTADT, GERMANY.

VELOCIPEDE.

SPECIFICATION forming part of Letters Patent No. 435,466, dated September 2, 1890.

Application filed June 11, 1890- Serial No. 355,090. (No model-l Patented in Germany September 6, 1889, No; 51,904, and in France January 9, 1890, N0.203,0 16.

To all whom it may concern.-

Be it known that I, CHARLES TERROT, a citizen of the Republic of France, residing at Gannstad t, in the Kingdom of VViirtemberg, Germany, have invented new and useful [mprovementsin Velocipedes, (which have been patented to me in Germany September (5, 1889, No. 51,904, and in France January 9, 1890, No, 208,045,) of which the following is a specification.

\Vhen in velocipedes the device for transmitting motion is arranged in such a manner that the operator can move continuously at a great speed when running along a level road, it is not possible to overcome considerable ascents of the road and a second smaller gear is absolutely necessary. All the devices for remedying this inconvenience hitherto known to me had two main defects, either the velocipede was charged too much, or the device & caused, not only when going uphill, but also mechanism.

when running along a level road, useless losses by friction, which were equivalent to a profuse expenditure of power, whereby the profit afiorded when running uphill is consumed again. In other constructions the changement of gearing requires so much time that it cannot be efiected 011 the read.

My improved device causes an additional weight of only one or two kilograms and it permits the operator to change gearing without descending by simply displacing a lever. There is, moreover, when running on level roads, no loss produced by friction.

The invention is shown in the accompanying drawings.

Figure 1 is a cross-section of the driving Fig. 2 is a side elevation. Fig. 3 is a front elevation of the same; and Figs. 4, 5, 6, and7 show details.

In Fig. 1, a is the bearing of the crankshaft applied to the frame G of the veloeipede. In this bearing revolve on balls *6 the chainwheelb and the transmitting-wheel c.

The naves of the wheels I) and c are constructed so as to form a clutch-coupling connecting the said wheels to each other. They are held concentric to each other by the socket d, pushed over them and fixed to the wheelb by means of a screw. In these coupled naves b and c revolves on balls 6 the crank-shaft f, furnished at the left hand with the crank g and at the right hand with the crank h. To the crank g is secured a cam-disk 7c, and to the crank h a toothed wheell.

Two other toothed wheels on and n, firmly connected to each other, revolve upon ballso around a shaft 19, secured to the lever q. The lever 1 turns around a pivot 0', fastened to the frame of the velocipede. The rod 8, jointed to the lever q, serves to raise and to lower the latter in order to throw the toothed wheels on and a, supported by the lever (1, into and out of gear with the toothed wheels Z and 0, respectively.

The rod 8 is provided close to the saddle with a handle and guided in a bow, in which it may be fixed in its three different positions by the engagement of a spring-pin.

To the spokes of the chain-wheel b are applied in a movable manner two diametricallyopposite pawls t, acted upon by small springs 15 and engaging with their hook shaped front parts into corresponding grooves of the cam-disk It, so that the chain-wheel b and the crank-shaft are connected together.

In order to disengage the pawls t each of the same carries a small steel roller 23'.

The chain-wheel b and the crank-shaft are disconnected from each other by means of a round disk 1;, provided with eccentric-lugs and connected through three straps owith a ring '0 The disk 1; and ring 4: are movable in the horizontal direction upon the bearing a of the crank-shaft. One of the straps c has a pin U with which engages the bent lever or, connected with the lever q through the rod 8. The lever turns on a pivot m, fastened to the frame G. By the motion of the rod 8, transmitted through lever q, rod .9, and bent lever w, the disk 41 is also displaced.

\Vhen riding on uneven ground, the rod 3, with lever q, is raised and held in this position by any suitable known means. By this the wheels on and n are thrown out of gear, and the ring r with disk 41, is moved to the right hand, whereby the pawls t of the chainwheel b are lowered and catch into the camdisk 7c, so that the chain-wheel I) is connected directly with the crank-shaft f, and both revolve together only on the balls 1'. When running uphill, the rod 8 is lowered, whereby the disk 11 is moved to the left hand, the rollers t enter the recesses z of the disks 2: and run on the same upon the circumference of the round disk 1), whereby the pawls t are raised and thrown out of gear with the disk 7c. The rod 8 is then moved more downward, so that the toothed wheels m n are thrown into gear with the toothed wheels Z and c. l/Vheel Z puts wheel min rotation, and the Wheel 91, connected to the wheel m, actnates the wheel and at the same time the chain-wheel b, which is driven now at the speed corresponding to the ratios of the wheels on n 0 Z. When running downhill, the rod and lever q may be held in their middle position, respectively. In this position the wheels m and n are out of gear with the wheels Z c and the pawl 15 is not yet engaged. The cranks remain, therefore, at rest, and may serve as a support to the feet.

The adjustment of the bearings is elfected by means of the nut y applied to the thread of the shaftf. By turning this nut not only the ball-bearing e is regulated, but also the two wheels I) and c are pushed into each other by the'lateral pressure of the balls 6 until the balls 11 are regulated also.

Having now particularly described and ascertained the nature of my said invention and in what manner the same is to be performed, I declare that whatI claim is A device for modifying the speed of velocipedes actuated by chains, which device is characterized by the arrangement of pawls it, applied to the spokes of the chain-wheel b,

and coupling the latter by means of the camdisk 70 directly to the crank-shaft, in combination with the disk n, which is pushed for the purpose of modifying the speed by suitable rods and bent levers underneath the rollers 16 t of the pawls t t, raising by this the latter from the cam-disk 7c and disconnecting the crank-shaft and the chain-wheel from each other, but throwing also at the same time the toothed wheels m n, connected with the above-saidlrods, into gear with the wheels 0 Z, connected with the crank-shaft and chainwheel, respectively, so that the motion of the cranks is transmitted only by means of the toothed wheels m n to the chain-wheel, substantially'as set forth, and shown in the accompanying drawings.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

CHARLES TERRO'L.

Witnesses:

Louis GOTTSCHALK, ERNST HUBER. 

